wittel



Match 6, 1928. 1,661,743

- o. WITTEL 7 MOTION PICTURE PROJECTOR 7 Filed Feb. 20, 1925 v 2Sheets-Sheet l 4 7/ I i Q INVENTOR,

Fl l4; j Fl E1 Y W7 I A77'0RNEYS.

-March 6,1928. I 1,661,743

0. WITTEL:

' MOTION PICTURE PROJECTOR Filed Febq 20, 1925- 2 Shets-Sheet 2 7 0x20ma INVENTOR,

A TTORNEYS.

' Patented Mar. 6, 1928. I v

, UNITED STATES 1,661,743 PATENT err-"11cc.-

o'rro WITTEL, or ROCHESTER, NEW YQRK, ASSIGNOR mo nesrmnn KODAK COMPANY,or ROCHESTER, NEW YORK, A CORPORATION or NEW YORK.

. MOTION-PICTURE PROJECTOR.

Appliea'tion'filed February 20, 1925 Serial No. 10,508.

This invention relates to motion picture" .apparatus and moreparticularly to improvements particularly applicable to a projector ofthe type shown in the apphcatmn of John 6 G. Capstafi, Serial No.10,601, filed'Feb.

Fig. l is a side elevation of a portion 16 of a projector showingparticularly the mechanisms associated with the gate. 2 Fig. 2 is afragmentary section on line a-aof Fig. 1. 1

Fig. 3 is a perspective view of the arm 2 carrying thepulldown-claws. IY

Fig. t is a section showing the mount-- ing. for the presser memberandthe objective support." D

Fig. 5 is a..front view, partly in section, of the same members.

member alone with its support.

Fig. 7 is a perspective view of the objec tive amount alone with certainsupporting members. q

Fig. 8 is a section on line 88 of Flg. 1. Fig. 9' is a front fragmentaryview-of the projection window. v

Fig. 10 is a fragmentary view from the rear of the guide for the latchof the objective mount.

Upon a base 1 is carried a longitudinal frame or partition 2, in therear of wh ch,

are mounted mechanisms and a lamp house not'constituting a part of thepresent invention and not shown here. A cylindrical casing 3 with acover 4 ismounted on the front of the partition. Centrally of this 10 ispivoted at!) to the gear disc 6 edcentrically thereof. At the other endof this I film, and intermediateof its length are lugs 11 throughwhich'passes a pin 12,0n which is pivoted one end of link 13 the otherend of which is ivoted at 14 to gear disc 7co- 56 .centrically t ereof.

Fig. 6 is a perspective view of thepresser casing is journaled a shaft 5carrying a car.

arm are claws 10' for engagement with the-= wall and fit it smoothly.

When these gears are driven the claws will? follow the path indicated indotted lines in ig. 1, and will pass through slots 15 in the cylindricalcasing and slots 16 in th bowed pre'sser member 17. The film F iscontinuously fed by sprocket l8, against which it is held by pressermembers ll) to and from a loop encircling the cyhndrical casing 3 andpassing between the casing and the presser member 17 Where it is fedintermittently by the claws 10' past the registering windows 23 inthefcasing wall 24: and the presser member. Light" from the lamphousing, .not shown, enters through an aperture 20 in the partition 2and, after reflection by a mirror, not shown,

illuminates the hhn at the windows, the illuminated image beingprojected by an objective 21 in the amount 5 1 upon a suitable. screen..Itis to be understood that the film is fed to and from the usual reels,not shown.

The presser'member 17 has at its upper end cars 25 with slots 26. A bolt27 passes throughwall 2 andis secured by a nut 28.- Rotatably mounted onthis bolt is a memher having a round head 30, a round concentric portion31, a round eccentric por-v tion orlcam 32 and a second larger eccentricportion or cam 33; The eccentric portion 32 passesthrou'gh the slots 26.I

The objective tube 22 is carried by a support 34 having side flanges 35and 36 at the I upper ends of which are vertical slots37- and 38, theslot 37 engaging over'the concentric portion 31 and the slot 38, whichis narrower than'37, engaging over the bolt 27. On flange 36 are twolugs 39 between which fits the eccentric 33. Itwill; be evident thatrotation of the head 30 will adjust vertically the p1'esser-95 member 17by action of the cam '32 on slots .26,.and the support 34' by action ofthe cam 33 on lugs 39. Springs 40 are coiled about the portion 32 andare attached at the ends 41 to the support 34 andbear at their otherends 42 against the middle portion of the member 17. If the were nofreedom of movement, for the upper end of presser member 17 it would notfit thewallof the casing when -adjusted. But the slots 26 permittheuppcr end to move. in and out under the resilient pressure of thesprings so that, as the presser is adjusted, it will follow thecylindrical 2 eanne The support 34, however, must be guided for acomplete disclosure of the invention.

in a strictly vertical direction so as not to This embodiment is by wayof'example and attained because the lugs 39 engage the cam 33 only'attop and bottom and. the slots 37 and 38 guide the movement. The lowerend of support 34 is normally heldin position by in 43 carried thereby.This pin passes wit a loose fit through hole 44 in flange37 and througha vertical slot 45 in flange 36. It is normally pressed toward flange 37by spring 46. The enlarged head 47 cannot pass through slot 45. When thesupi port 34 is swung about its supporting bolt the pin slides in slot48 in wall 2 and when in normal position head 47 engages in a"countersunk portion 49 shown in Fig. .5

and 10. p 1

The pin is pushed back to disengage the head from the cavity 49 when thesupport 34 may be swung open. \Vhen support 34 is adjusted vertically,the head and countersink act as a ball and socket joint, there beingenough play between the pin and hole 44 for the slight necessary angularadjustment of the pin at the point, and the pin has the necessary playin slot 45.

It is understood that the purpose of this vertical adjustment is topermit framing adjustment of the window 24, without atfecting thepulldown mechanism or the optical system. The slight vertical movementof the window and objective together is not visible on the screen exceptas it affects the framing.v

When it is necessary or vdesirable to inspect or clean the inner guidingsurfaces where the film passes between the presser 17 andcasing 3, thesupport 34 is unlatched and swung up around the bolt 27, carrying thesprings with it and permitting the presser member to be swung 'out.

The bolt 27 and nut 28 are so adjusted that the friction between theshouldered head 50 of the nut and corresponding seat 51 in the head 30,and the friction between cam 33,

flange 36 and wall 2 are suflicient to hold the parts in adjustedposition but'not enough to render adjustment difiicult.

The objective tube 22 .has a resilient tongue 50" with a. protuberance51'- engag- 7 and usual structural parts have been omitted asunnecessary to an understanding of the invention, and that there areshown only such elements as seem desirable or necessary afiect the focusof the objective and this is- I contemplate as within the scope of myinvention all such modifications and equivalents. 1

as are properly covered by theappended claims. i I p e Having thusdescribed my invcntiomwhat I claim as new and desire to secure byLetters Patent is: 'l.-In motion picture apparatus, a frame, an exposuregate comprisng a guide and a presser member between which film may bedrawn, an objective support, a common support upon which-both saidpresser member andobjective support are separately pivotally supportedand means for adjusting said pivotal support longitudinally of the gate.

2; Inn'1otion picture apparatus, a wall, an

exposure gate comprising a guide extending 3. In motion pictureapparatus, an exposure gate comprising correspondingly longitudinallybowed guide and presser members, the presser. member being resilientlypressed toward said guide member, means for adjusting said pressermember longitudinally of said guide and permitting it to follow thecurvature thereof when so adjusted.

4. In motion picture apparatus, a supporting frame, an exposure gatecomprising longitudinally bowed guide and a correspondingly bowedpresser member, the guide being fixed on said frame, a support extendingfrom the frame and comprising an adustable part, the presser memberhaving a slot engaged by said part by whiclrit is pivotally supportedtherefrom and whereby it has movement toward and from said guide, andmeans for resiliently pressing said presser member toward said guide.

' 5. In motion picture apparatus, an exposure gate-comprisinglongitudinally bowed guide and pnesser plates having windows,

the presser member being resiliently pressed toward said guide members,an objective support in alignment with ,said windows, and means foradjusting said presser plate and said objective support longitudinallyof v the gate, the presser member having freedom of movement to followthe curvature of the guide member during such longitudinal adjustment.

6. In motion picture apparatus, an exposure gate comprisinglongitudinally bowed guide and presser plates having windows, thepresser member being resilientl pressed to ward said guide members, an ojective suplongitudinally jective port in alignment with said windows,and means for adjusting said presser said objective supp I gate,thepresser member having freedom of movement to follow the curvature ofthe guide member and the objective su'pportbemg limited to a movementperpendicular to itsaxis. i j

7. In motion picture apparatus, a supporting frame, an exposuregatej'comprising a bowed guide member and a correspondingly bowedpresser member, said members having registering windows, an obsupport inalignment with said windows, supporting said presser member and saidobjective support and including separate cams for adjusting themlongitudinally of the gate, the presser member having freedom ofmovement to guide member. 8. 1n motion picture apparatus, a supportingframe, an exposure gate comprising a longitudinally bowed guidememberand a correspondingly bowed presser member, said members havingregistering windows, an ob ,jective support in alignment with saidwindo'ws, and means carried by said frame for supporting said pressermember and said obment to follow the curvature of the jective supportand including cams for adjusting them longitudinally of the gate, thepresser member having freedom. of inovggui e member, and means to guidethe objective support, when adjusted, in .a direction perpendicular toits axis. a

9. In motion picture apparatus, an exposure gate comprising a guide anda presser .member between which film maybe drawn,

said presser member being movable with respect to said guide, a' movableob ective support having an operative position with re spect to saidgate, and a spring between vsaid support and said presser member andadapted to be tensioned when said support is in operative position toexert a resilient pressure on said presser member and to be relaxed whensaid support is removed from operative position. v

10. In motion picture apparatus, an exlate and, ort longit 5' of thepect to Said g i and means carried by said frame for" followthecurvature of the posure gate comprising a guide member. between whichfilm may be drawn, said presser member being movable with rea movableobjective support having-an operative position with respect. to saidgate, and a spring between said and a presser P support and said pressermember and adapted to be tensioned when said sup is in operativeposition to exert a resi ent pressure on said presser memberand to berelaxed when said'support is removed from operative position and meansfor'adjustingsaid presser member and said support longitudinally of thegate.

11. In motion picture apparatus, a frame,

ortm

an exposure gate comprising a film guide carried by said frame, and apresser mernber pivotally carried by -said frame and adapted to be swungguide, an objective support pivotally carried by saidframe and having anoperative position with respect to said gate, means for holding thesupport in said 0 erative position, and a spring between sai support andsaid presser member and adapted to be tensioned when said support .lS inoperative position to exert a, resilient pressure on said toward andfrom said i '70 presser member and to be relaxed when said support isremoved from operative position, 12; In motion picture apparatus, aframe,

an exposure gate comprising a film guide -carried by said frame and apresser member pivotally carried by said frame and adapted to be swungtoward and fromsaid guide, an objective support pivotally carried bysaid frai'ne and having an operative position with respect to said gate,means for holding the support in said operative position, and a springbetween said support and said presser member and adapted to betensionedwhen said support is in operative position to exert a resilientpressure on said presser member and to be relaxed when said support isremoved from operative position and means for adjusting said pressermember and said support longitudinally of the gate.

Signed at Rochester, New York, this 16th day of February, 1925 OTTOWITTEL.

